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United States Patent |
6,089,263
|
Dumser
|
July 18, 2000
|
Distribution device for a liquid medium-operated circuit of a heating or
cooling system
Abstract
A distribution device for a circuit operated with a liquid medium for a
heating system or a cooling system, such as a hot water heating plant, a
solar plant or the like. The distribution device serves to separate the
medium into individual circuits each having a distribution pipe for
forward and return flow, wherein the distribution pipes are provided with
regulating and locking members as well as, if necessary, measuring and
indicating members for the individual circuits. The regulating and locking
members include members for preadjusting the maximum flow rate and for
regulating the respective circuit, wherein the regulating and locking
members are each combined in a fitting with only one valve body with flow
from the front against the valve body, and wherein the regulating and
locking members are exclusively arranged in the return flow pipe.
Inventors:
|
Dumser; Josef (Landau/Pfalz, DE)
|
Assignee:
|
Dumser Metallbau GmbH & Co., KG (Landau/Pfalz, DE)
|
Appl. No.:
|
150795 |
Filed:
|
September 10, 1998 |
Foreign Application Priority Data
| Sep 18, 1997[DE] | 297 16 779 |
Current U.S. Class: |
137/552; 137/563; 137/883; 137/887 |
Intern'l Class: |
E03B 007/07 |
Field of Search: |
137/552,883,887,606,563
|
References Cited
U.S. Patent Documents
3804118 | Apr., 1974 | Love et al. | 137/883.
|
5303733 | Apr., 1994 | Nelson | 137/883.
|
5311895 | May., 1994 | Martin | 137/883.
|
Foreign Patent Documents |
8903159 | May., 1990 | DE.
| |
4325737 | Feb., 1995 | DE.
| |
Primary Examiner: Chambers; A. Michael
Attorney, Agent or Firm: Keuffner; Friedrich
Claims
I claim:
1. A distribution device for a heating or cooling system operated in a
circuit of a liquid medium, for distributing the medium into individual
circuits, the distribution device comprising a forward flow pipe and a
return flow pipe, further comprising regulating and locking members
mounted exclusively in the return flow pipe, wherein the regulating and
locking members comprise members for pre-adjusting a maximum flow rate of
the medium and for regulating a flow of the medium through each circuit so
that the forward flow pipe is free of any flow control means, and wherein
the members for pre-adjusting the maximum flow rate and for regulating the
respective circuit are each arranged in a fitting with only one valve body
configured such that the medium flows against a front thereof.
2. The device according to claim 1, further comprising measuring and
indicating members mounted in the forward flow pipe.
3. The device according to claim 2, wherein the measuring and indicating
members comprise flow rate indicators and temperature measuring devices.
4. The device according to claim 1, wherein the forward flow pipe and the
return flow pipe extend horizontally.
5. The device according to claim 4, wherein the forward flow pipe is
located in an upper plane and the return flow pipe is located in a lower
plane.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a distribution device for a circuit
operated with a liquid medium for a heating system or a cooling system,
such as a hot water heating plant, a solar plant or the like. The
distribution device serves to separate the medium into individual circuits
each having a distribution pipe for forward and return flow, wherein the
distribution pipes are provided with regulating and locking members as
well as, if necessary, measuring and indicating members for the individual
circuits.
2. Description of the Related Art
Distribution devices of the above-described type serve as so-called circuit
distributors for distributing in an adjustable and regulating manner the
heating medium circulating in a heating system to local individual heating
locations. This type of device is required especially in the case of floor
heating systems. A floor heating system is comprised of several individual
heating circuits which are branched off from the main heating system by a
plurality of adjusting and regulating members. These adjusting and
regulating members require a large amount of space and must be
accommodated in such a way that they are accessible for operating and
maintaining them.
In order to save space, it is already known in the art to use as
distribution devices pipe sections which are each connected through
locking members to the forward flow pipe or the return flow pipe. In these
pipe sections, pairs of openings are provided in the pipe wall, wherein
the openings are offset relative to each other by 180.degree. at opposite
locations. An actuating member is mounted in one of the openings, wherein
this actuating member acts directly on a valve which is mounted in the
other opening (DE 89 03 159 U1).
In particular in floor heating systems, it is necessary that the circuits
for individual rooms can be regulated independently from each other. Since
the heating circuits are of different size depending on the area of each
room, in addition to the conventional regulating valves which are operated
manually by means of an electric adjusting drive or through a thermostat,
so-called flow rate limiting devices must be arranged for adjusting the
maximum flow rates for each circuit.
Since in regulating valves the flow must always be against the valve body,
these valves can only be used in the return flow in the case of heating
circuit distributors. Flow rate limiting devices are mounted in the
forward flow. This means that fittings which serve to regulate the flow
must be mounted in the forward flow as well as in the return flow in these
known heating circuit distributors.
The measuring and indicating members, such as flow rate indicators and
temperature measuring devices, are independent of the regulating and
locking members. In order to be able to mount the measuring and indicating
members simultaneously, the heating circulating distributor described
above provides for mounting the flow rate and temperature measuring units
to be mounted in the return flow of the individual circuits and to combine
them with the members for regulating the heating circuit, while arranged
only in the forward flow are the members for preadjusting the maximum flow
rate.
Particularly when compact radiators are used, it is also known in the art
to combine a regulating valve with a flow rate limiting device in one
structural unit (DE 43 25 737 C2) . In this regulating valve which is
arranged in the forward flow, i.e., the flow is from the front against
this valve, the flow rate limiting device has in an outer pipe portion a
flow opening and in an inner, also tubular, portion a number of openings
with different diameters which can be placed in alignment with the flow
opening in the outer pipe portion by rotating the inner pipe portion. In
this manner, a socket wrench can be used for adjusting from the outside
several predetermined flow rates. This corresponds to the use of compact
radiators having certain sizes.
SUMMARY OF THE INVENTION
In view of the prior art discussed above, it is the primary object of the
present invention to provide a possibility for achieving a simpler more
easily assembled and operated and especially more economical type of
construction in a distribution device of this type, particularly a heating
circuit distributor.
In accordance with the present invention, the regulating and locking
members include members for preadjusting the maximum flow rate and for
regulating the respective circuit, wherein the regulating and locking
members are each combined in a fitting with only one valve body with flow
from the front against the valve body, and wherein the regulating and
locking members are exclusively arranged in the return flow pipe.
Accordingly, in accordance with the present invention, all regulating and
locking members, i.e., flow rate limiting devices and regulating valves,
are each combined in a fitting in the return flow pipe in which the flow
against the valve body is from the front of the valve body to provide an
advantageous flow behavior, while measuring and indicating members, if
they are to be provided at all, are arranged in the forward flow pipe. The
type of construction of each individual member is of no significance.
The greatest advantage with respect to operation is achieved if, in the
heating circuit distributor according to the present invention in which,
as is usual, forward and return flow pipes are arranged parallel to each
other and extending horizontally, the return flow pipe is arranged in a
lower plane and the forward flow pipe is arranged in an upper plane. This
makes it possible in a simple manner to adjust in the individual heating
circuits in the lower plane the maximum flow rate which can be easily and
clearly controlled by means of the flow rate indicator arranged in the
upper plane. After the preadjustment of the maximum flow rates by means of
appropriate tools, a knob for manual adjustment or an electric adjusting
drive can be placed on each valve in the conventional manner. By arranging
the flow rate indicator in the upper forward flow pipe, there remains
above the heating circuit distributor sufficient space for accommodating
the electrical regulating and control members including the electric
installations required for these members.
The various features of novelty which characterize the invention are
pointed out with particularity in the claims annexed to and forming a part
of the disclosure. For a better understanding of the invention, its
operating advantages, specific objects attained by its use, reference
should be had to the drawing and descriptive matter in which there are
illustrated and described preferred embodiments of the invention.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
FIG. 1 is a schematic elevational view of a heating circuit distributor;
FIG. 2 is a cross-sectional view of the heating circuit distributor of FIG.
1;
FIG. 3 is a partially sectional view, on a larger scale, showing an
embodiment of a flow rate indicator to be used in accordance with the
present invention;
FIG. 4 is a partially sectional view of an embodiment of a regulating valve
with flow rate limiting device to be used in accordance with the present
invention; and
FIG. 5 is a schematic elevational view of another embodiment of a heating
circuit distributor.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The heating circuit distributor 1 shown in a side view in FIG. 1 and in a
cross-sectional view in FIG. 2 includes an upper forward flow pipe 2 and a
lower return flow pipe 3. The forward flow pipe 2 and the return flow pipe
3 are combined and held at a distance from each other by means of brackets
4, wherein the pipes can also be attached to a wall by means of the
brackets 4. Forward flow and return flow are indicated by arrows V and R,
respectively.
Provided on the forward and return flow pipes 2 and 3 are branches 5 for
the forward flow and branches 6 for the return flow of the individual
heating circuits , wherein indicating members 7 are provided at the
branches 5 of the forward flow pipe 2 and regulating members 8 are
provided at the branches 6 of the return flow pipe 3. An embodiment of an
indicating members 7 is shown in FIG. 3 and an embodiment of a regulating
member 8 is shown in FIG. 4.
Additionally provided in the heating circuit distributor 1 on the boiler
side is a locking member 9, for example, in the form of a ball valve, in
the forward flow pipe 2 and another corresponding locking member 10 in the
return flow pipe 3. Provided on the opposite side in a distributor end
piece 11 are the conventional members for filling or emptying 12 and for
aerating 13.
FIG. 3 shows, partially in section, a measuring and indicating member for
the flow rate to be used within the distributor according to the present
invention. The indicating member is denoted by reference numeral 7. The
indicating member 7, as shown in FIG. 1, is mounted in the forward flow
pipe 2. The branch 5 is screwed with a pipe piece 14 into the forward flow
pipe 2.
Opposite the screwed-in part of the branch 5 and the pipe piece 14 is
located an also screwed-in guide piece 15 for an observation glass 16 of
transparent material. An indicator 17 can be seen in the glass 16, wherein
the indicator 17 is in connection through an indicator rod 18 with a
baffle plate 19. The forward flow flows against the baffle plate 19 in the
pipe piece 14. A flow guide sleeve 20 connects the pipe piece 14 in a
sealing manner to the guide piece 15 or the observation glass 16. The
sleeve 20 has lateral openings 21 through which, as indicated by arrow 22,
the medium forming the forward flow can enter in the sleeve 20 and can
leave the forward flow pipe 2 through the branch 5.
The observation glass 16 is surrounded by a scale carrier 23 which,
adjacent to a viewing opening, has a scale 24 which interacts with the
indicator 17. The medium flowing against the baffle plate 17 moves the
baffle plate 17 downwardly against a compression spring element 25, so
that, depending on the flow rate, the location of the indicator 17 can be
read at the scale.
A regulating member to be used in accordance with the present invention is
shown in FIG. 4 on a larger scale.
This regulating member, indicated by reference numeral 8, is provided in
the return flow pipe 3. Similar to the indicating member 7, a screwed-in
piece 30 protrudes with a pipe piece 31 into the interior of the return
flow pipe 3. The upper end of the pipe piece 31 forms a valve seat 32.
A guide piece 33 is mounted from the top in the return flow pipe 3. In
insert piece 34 is screwed into the guide piece 33. The insert piece 34
has at the top thereof a square portion 35 for actuation by means of a
tool. A valve rod 36 extends through the guide piece 33 as well as through
the insert piece 34. At its lower end, the valve rod 36 has a valve cone
37 and at its upper end the valve rod 36 has a stop collar 38 which makes
contact with a shoulder in the insert piece 34. Consequently, by screwing
in the insert piece 34, the maximum travel height of the valve cone 37 and
the flow gap 39 can be limited.
In the illustrated embodiment, an electric adjusting drive 40 provided with
an electric connection cable 41 is mounted on the regulating member 8. In
dependence on a thermostat, this adjusting drive 40 can be used for
opening and closing by moving the valve rod 36 and, thus, the valve cone
37 to the adjusted height. The circuit can be regulated in this manner.
As illustrated in FIG. 5, the heating circuit distributor la according to
the present invention can be further simplified and made more economical
by using as locking members 9a, 10a those disclosed in German Utility
Model 296 21 038 which include, in addition to the locking function by a
ball valve, each a connection 12a for filling and emptying the heating
circuit and an automatic aerating device 13a. In that case, simple closing
caps 42 are sufficient on the opposite sides of the forward flow pipe 2
and the return flow pipe 3.
While specific embodiments of the invention have been shown and described
in detail to illustrate the inventive principles, it will be understood
that the invention may be embodied otherwise without departing from such
principles.
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